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The Archean geologic eon , approximately 4,031 to 2,500 million years ago, in Precambrian time. This category contains events which happened in the Archean, a division of the geologic time scale. See geologic time scale for information about its divisions and how they relate to each other.
This category has the following 5 subcategories, out of 5 total.
Pages in category "Archean"
The following 20 pages are in this category, out of 20 total. This list may not reflect recent changes (learn more).